Butter-packing machine.



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JOHN MATTSON, OF DRESSER JUNCTION, WISCONSIN.

BUmRf-PAGIING HACHINE.

lpadfleatton of Lettera Patent.

Patented lept. 22, 1900.

Application lied April l0, 1.07. Iorial No. 800,8".

To all whom it may concern.'

Beit known that I, Joux Ma'rrsox, a citizen of the United States,residing at Dresser Junction, in the county of Polk and State ofWisconsin, have invented certain new and useful Improvements in Butter-Packin Machines; and I do hereby declare the fo lowing to be a full,clear, and exact descri ition of the invention, such as will enab eothers skilled in the art to which it appertains to make and use thesame.

My present invention relates to machines for packing butter and otherplastic. matcrials within tubs, jars or 'other suitable re ccptaeles,and has for its object to improve the same in theseveral particularshereinafter noted.

The invention consists of the novel devices and combinations of deviceshereinafter described and defined in the claims.

This invention is in the nature of an improvement on the machinedisclosed and roadly claimed in my rior patent No. 806,159, issued ofdate eeember 5, 1905, and entitled "Butter packing machine".

The present improvement is particularly directed to the trippingmechanism whereby, under predetermined pressure, -thc plunger actuatimechanism is tripped out of action ariif then reversed, to therebyautomatically effect thc return movement of the plunger to its normalposition after it has com leted a working stroke.

Tie invention, however, involves other minor but important features ofimprovement as will hereinafter appear, both in the speci eation and inthe claims. h

he improved machine is illustrated in the acconnanying drawings, whereinlike characters Indicate like parta throughout the several views. I

Referring to the drawings, Fi 'ure 1 is a side elevation of the improve(machine, with some arts sectioned on thc line z .r of Fig. 2. igP. is afront elevation of the improved machine showing the butter receiving tubin position for filling, said tub being shown in vertical section. Fig.3 is a plan view of the machine, with some parts roken away. Fig. 4 is ahorizontal section taken on the line x* .r of Fig. l. Fig. 5 is a detailview in side elevation, showing the packing plunger, vcouwratingstripper and associated parts of the tripping mechanism. Figi 6 is aront elevation o thc parts shown in ig. 5; Fig. 7 is adetail in frontelevation,

showing the plunger and its carrier, some parts being broken awa Fig. 8is a horizontal section taken on t le line z' z of Fig. 6. Fig.- tl is adetail in horizontal section, taken on the line s z of Fig. 6. Fi v. 10is a horizontal section taken on the line z z" of Fig. 6, and showingthe parts on an enla ed scale. Fig. ll is a horizontal section ta en onthe line x a of Fig. 7, and showing theparts on an enlarged scale. Fig.12 is a dctail view in front elevation, showing the plunger, cooperatingstri per and means for connecting t ic same, am lllustrating an ad-'ustment thereof tlifl'erin v from that shown m other views. Fig. 13 1sa vertical section taken on t-he line z" x" of Fig. 3, some parts beingbroken away. Fig-14 is a detail in horizontal scctioxntaken on thc linez x of Fig. t3. Fig. l5 is adctail in plan with parts broken away,looking at the top of the nut acting thrust. gear which works on the uper end of a threaded plunger actuating rolt. Fig. 16 is a verticalsection taken on the line s z of Fig. l5. Fig. 17 is a detail view inplan, showing a bearm v step with the lower end of the vertical sha t ofthe tub or receptacle carrier. Fi 18 is a vertical section on the line xz oit Fi f. 17; and Fig. 19 is a horizontal section taken on the line x"z" of Fig. l.

All of the arts of the machine are supiorted, direct y or indirectly,from a skeleton ramework l, the base of which is adapted to rest uponthe floor. The tubs or receptacles in which the' lmtter or other lasticmnterialisfobc mcked areindieatcd y the character a and t lese areadapted to be supported and presented, one after the other, under theplunger of thc machine by a parcel carrier made up, as shown, of fourradial arms '.l, which at their inner ends are rigidly secured to thelower end of a vertical carrier shaft 3. 'lhc lower end of this shaft 3(sce Figs. 17 and 1S) is journaled in aste i bearing or socket 4 whichis secured to tile lower beams of thc f rame work l. A bearing ball 5 isircfcrably interposed between the lower emi of said shaft 3 and thebearing socket4. 'lhe u per end 'of said shaft 3 is shown as journalledin a bearing t5 on the upper portion of thc framework l. Secured to theouter end of cach arm 2 is a tub holder 7 which, as shown, is made up ofthree arms, two of which are formed with ill-turned barbs and the thirdof which is provided with a clamping screw S.

When one of the tub holders 7 is lnovcd into a position lo locate thetub held thereby umler the packing plunger of the machine; itssupporting arm 2 rests u on a rigid sup- )ort oranvilshownasin the ormof a metalic strap or bar 9 secured at one end to the framework 1 amlhaving a down-turned end that is adapted to rest upon the floor. As willpresently appear, this support 9 holds the pimitioned downward movementunder t te compressing force of the packing plunger.

The carrier shaft 3 is shown as provided with an operating wheel 10 bymeans of which it may be rotated at will to move the tub holders andtubs held thereby, one after another, under the packing plunger. Forlocking the tub carrier with one or the other of the tub holdersproperly alined under the packing plunger, a suitable latch is provided.

his latch is preferably in the form of a spring har ll secured at oneend to the framework l, having a notched earn lug l2 (see Fi 1 and 2)that is adapted to en 'age aml that wo ho d a lock flange 13 on the endof t ic alined carrier arm 2. The upward movement of the spring latchbar ll is, as shown, adapted to be atustcd by means of a set screw 14 sthrough a small bracket l5 sccured to braces ltof the framework l. Thenumeral 17 indicates a thrust resisting set screw which has threadedengagement with the supporting bar 9 with its upper end in position toengage and prevent any material downward movement of the alined carrierarm 2.

The packing plunger 18 is supported by a telescopic carrier made u i, asshown, of a sleeve 19 and a threaded slhaft 29, the latter of whichtelescopes into the former and the threaded portion of which is engagedby the threaded mb of a nut acting gear 2l. This gear 2l is, as shown,in the form of a bevel gear and is arranged to work between verticallyspxced metallic retaining straps 22 and 3 t t are rigidly secured to theu per portion of the framework l. Bearing alls 24 are shown asinterposed between the upper strap 23 and the upper face of the gear .l

or the purpose of rcduein friction duc to end thrusts. A coiled s ring25 is placed within the sleeve 19 andl is compressed between the lowerend of the shaft 29 and a pin 26, which pin is adapted to be passedthrough any one o several perforations 27 in the said sleeve to vary thetension of said spring. The sleeve 19 is formed with a longitudinal slot28 at its front face. 'lhe stem of a llat.- tened stud or iawl su )port29 works through the slot 28 and is rigit ly secured to the lower end 0fthe threaded shaft 20. The spring 25 tends to maintain engagement.between the stem of the said stud 29 and the upper exf tremity of theslot 28. 'I` he racking plunger 18 has a shank I8 that. lits within thelower tub or reecitaele against end of the sleeve. i9 and is detachablysecurable lo said sleeve by bayonet joints shown as made up of adismetrically extended pin 30 in said stem and angular slots 3l in saidsleeve.

'lhe nut acting bevel gear 21 meshes with a similar gear 32 carried, asshown, by one end of a horimutally dis osed driving shaftl 33 mounted insuitable carings 34 secured on top of the fraowwork l. Un this shaft. 33is a pair of laterally spaced loose pulleys 35 and 36 and auintermediate fixed pulley 37. Power driven belts 38 and 39 run over thepulleys 35, 36 and 37 and are shifted from one to the other of the saidpulleys bv mechanism mscntly to hc dcscrilwd. (lne of the said eltsshould be' a erossml belt so as to adapt the feed belts to drive inreverse directions. Normally, the belt 38 runs on the idle pulley 36 andthe belt 39 runs on the idle pulley 35. 'lhe position ol' the belt 39 iscontrollcd by the n'ongs 4t) of a shipper rod 4l mounted to slide butheld againstl rotary motion ou hearinr extensions 34" of'the bearings34. 'lhe )elt 38 is guided by the prongs 42 of a second shipper rod 43which is lnounted toslide between guides 44 on thetop of the framework l(see Figs. 2 and I3). 'lhe shi ppcrrod 43 is pivotally connected to alever 45 which, at its rear end, is pivotally connected to the frameworkl, and at its free elul is connected to said framework by a spring 46.'lhe tension of the spring 46 is such as to .normally hohl the belt 38on the loose pulley 36. One of the pron s 42 is bent at its end forengagement wit l one of the rongs 40 of the shipper rod 4l.

'liie machine is thrown into action by moving the belt 38 onto the ixedpulley 37 of the shaft 33, and to accomplish this result, I have shown afoot )ieee 47 which isfslidably mounted on one of t ie u rights of theframework l, and is eonncctcdl, bv a small chain or flexible connection4H, to the free end of the lever 15. 'l`hc intermediate mrtion of saidchain 48 runs over an idle uit e sheave 49 on the up er portion of theframework l. When t te level' 45 is moved toward the left so as to movethe said belt 38 onto the lixeil pulley 37, as just. described, the saidparts will be tem|mrarily locked in such position by the engagement.with the outer end of the `shipper rod 43 with the free end of a latchlevel 50, which latch lever, ai its'rear end, is pivoted to the upperportion of the framework I (sce Figs. 1,3, t3 and l-l). A'lhefree eluloll said latch lever 5t) is held against lateral movements b v avertically slotted guide plate 5l that is rigidly secured to the up erportion of thc frame l. Also, the free cui of said latch lever isconnected b v a linkA 52 to au oscillatory beam or lever 53 that isintermediately pivoted to the upper portion ol the bearing extension-3-1 above noted. '7o the other cud of the beam 53 is pivotally attaeheda depending trilp rod 54. 0n the lower end of the tri rot 54 is anadjustable sto sleeve 55. This stop sleeve has a longitnt mal slot thatis formed in one edge with oblique notches 56 any one of which isadapted to engage a small iin 57 of the said tripping rod, to thereby aijustably support said sleeve from said rod.

Mounted to slide ve 'cally through the guide straps 22 and 23 he oredescribed, is a ratchet toothed rod, so-ealled, the tripping rack 58.This rack 58 is s irin vsup|sirted by a li 'ht coiled spring 50 p acctou the up ier ent thereof and reacting against the guide strap 23 and apiti 66 in the upper end of said rack. Ri'idly seeured to theintermediate portion o the tripping rack 58 is a latlerally projectingarni 6l through a perforation in the outer end of which the tripping md54 is passed. Under downward movementof the tripping rack 58 the arm 6lis eiigageahle with the upper end of the stop sleeve 55.

'lhe stripper, so-ealled, is in the form ol' a heavy ring 62 whichsurrounds the packing plun er t8. The stripper 62 is supportml by astripper carrier which is inde|sndent of the plunger carrier, or atleast capable of movements independent thereof. l`his stripper earrieris preferably made up of an up ier head plate 63, a lower head plate 64am a pair of vertically extended connecting rods 65, which latter arelocated one on each side of the sleeve tti of the plunger carrier. 'lhehead plates 63 and 64 are perforated and slide verticallv upon thesleeve lt) and rod 26, rcs tively, of the plunger carrier. Near tieirAupper ends, the rods 65 work freely through perforations in a llange 66that pro- 'ects from the u per end of the sleeve tt).

ie lower head p ate 64.,is held against rotation on said sleeve lt) livvertical ribs `6 formed on the sides of said sleeve. 'lhe said sleeve t9is itself'held against rotation by roller equipped studs 68 t iat arearranged in pairs for e agement with the ribs 67 and are supported romthe framework l by a bracket 66 (see particularly liifs. 2 and tti).'lhe stripper 62 is detaeha ilv sccorable to the lower head plate 64 oftie stripper, and to this end it is provided with a pair ot'diametrically opposite vertically extended arms 76 having hooked ends 7lthat are passed through perforations in said lower head plate 64 and areengaged by and interlm-.ked with the free ends of a spring hitch bar 72,which latch har is intermediately eonneetml to the said plates 64, asbest shown in Fig. lt).

It will be noted that the lower ends of the rod 65 have threaded enagement with the lower head plate 64, and iliat the upper ends of saidrod are coniueted to the upper head 63 by nuts 65'. 'lhis makes itiossilile to adjust the two heads 63 alid 64 with respect to each other:A pin 73 which is adapted to be inserted in any one of severaljwrforations 74 in the lower end of the sleeve 19 is located above thelower head plate 64 of the stripper carrier and acts on said head 64 toforce the stripper downward after the packing plunger has been givena'prmleteriiiinml hutI variable initial downward movement.

Normally, the head ilates 63 of the stripper carrier is supporter by theIlangml upper end 66 of the sleeve tti of the plun ver carrier, in whichposition the plunger wil be drawn npinto the stripper a greater or lessdistance, depending on the adjustment of the rods 65. At the renr of theplunger carrier, is a vertically dis iosed ratchet liar 75 which isrigidly set-arci at its upper end to the 'uide har 22 and at its lowerend to the racket 66. 'l`he teeth ol' this rack 75 are arranged to workreverselv to thosel of the ratchet. teeth of the so-ea led tri ipingrack 58. livoted to the upper head p nte 63 (see Figs. 5 and 8) is alock dog 76, the free eml of which is normally engaged h a cam or wedgeblock 77 carried by. the ange 66 at the upper end of the sleeve tti. Aspring 78 attac ied to said dog 76 aml to a pro'eetion of the head plate63 serves to throw t ie dog 76 into engageiiielit with the teeth of theratchet. bar 75 whenever downward move iuents of the stripper is stoppedby engagemeuty with the butter aml the plunger eontinues to move.

Mounted to slide on the llnttenedstml 26, which latter, ns has heennoted, is carried by the threaded shaft 26, is a lock dog 76. 'lhis lockdog 7%), as shown, has a perforation 86 through which the tripping rac58 is passed, and one extremity or side ol'l this perforation engageswith the teeth of said tripping rack under the tension of one or moresprings 8l attached to said dog and to said flattened stud 2li.Normally, however this dog 76 is held out of engagement with theteeth ofsaid rack 58 by a cam block or plate 82 which is secured to and de )endsfrom the flange 66 of the sleeve ltham engages with a projecting lug 83of said lock dog.

'lhe projecting end of the shipper rod 4l, above described, is connectedto the slotted upper eml ol' an arm Htl ol' a rock shaft 85 mounted insuitable hearings on the upper portion of the framework l. A spring 86attached to said arm aml to the vulde strap 23 tends to throw saidshipper rot 4t toward the right. with respect to lig. 2. An oblique arm87 which is preferably weighted at its free end, is rigidlv secured tothe rock shaft 85. and is normally engaged by a projection 66l ol' thesleeve llange 66. 'lhe engagement of the said projection 66 with theoblique arm 87 holds the shipper rod toward the left. with respect. toltig. 2, and the belt .'ltton the loose pn ley 35, when the parts are innormal position nml when the sleeve tti of the plunger carrier is., ol'course, in its extreme uppermost position.

asv

Operation: Before the machine is started into action, a tub orreceptacle for the butter or other plastic material to he packed, must,of course, he properly positioned directly under the packiii f plunger.when tlie mac iine is at rest, the helt 3h runs upon the loose pullev 35and the helt 38 rims upon the loose pulley 30, and to start the machineinto action the o|wratorsteps upon 1o the foot piece 47, tlicrehy movingthe helt 30 onto the Ipullev 37 of the shaft. 33, as already deserihei'I ie shaft 33 and the iuit acting gear 2l are thus given rotary motionin a proper direction to niove-tlie threaded shaft 2t) verticallydownward. When the shipper rod 43 is moved toward the left with respectto Figs. l, 2 and 3, and from the left toward the right with respect toFig. I3, the hitch lever Mi under the teiision'of the spring 53 is movedin line with the end of said shipper rod, and therehv teni'mrarily locksthe saine ina posit-ion to hold t ie lielt 38 ou the pulley 37. When thenon-rotary threaded rod 20 is moved downward, it carries with it thesleeve ltl, the packing plunger I8 the stripper (l2 and the strippercarrier, all .of which parts maintain their normal relative positionswith respect to cach other until the said stripper is stopped hyengagement with $0 the hiitter or material which is to he packed withinthe hueket. or rece ttacle. After the strilpper luis heen engagei withthe huttcr am its downward movement temporarily intercepted, the packingplunger continues its downward movement through the strip ier` and intoen 'agement with the butter. he distance w iich the said plunger will hemoved while the stripper reiuains stationary depends on the distancewhich the pin 73 is 40 iioriiiall set ahove the lower head pliite (i4.Wlieu, liowever, the said pin 73 is moved downward into engagement withthe said plate 64, the stripper will he caused to move` downward withthe plunger, tlierehy causing 46' hoth the plunger nml stripper tocompress and pack the liutter. 'lliiit movement of the plunger I8 andits sleeve l0 which takes place after the movement of the strip ier luiseen tenitmrarily intercepted. and he ore the I0 downward movement of thesaid stripper is contiinied hy engagement of the iin 73 with the plate64 carries the cani liloc 77 out of engagement with the end of the lockdog 76 aiu tlierehy permits the spring 74 to throw the said do r intoaction on the teeth of the lixed rack iar 75, so that under continueddownwanl movement of tlic stripper, the said dog will slip over vthesaid ratchet teeth and temporarily lock the stripper in the lowestposition to which it may in the particular iiistance, happen to heforced. Otherwise stated. the said stripper is thus automatically lockedin its lowcrniost position and against initial return movement with theplunger.

When the plunger hits the hutter under its As already stated, I

downward movement its further downward movement will take place underincreasin resistance which will compress the spring 2 and cause thethreaded shaft 20'to move downward faster than the sleeve tti andplunger 18, and this will cause the sliding ock dog 7h to move away`Yfrom the cani hlock 82, as shown in Fig. 5, aiul the spring 8l willthen cause the said lock dog to engage the teeth of the trip rack 58 andtherehy cause the latter to commettre its downward movement with thetlireiulcd shaft 20. lt will thus he noted that the do v' 71| is throwninto action on the trippingyaii'lt 58 approximately simultaneous withthe release of the ilog 76 for action on the ratchet har 75. The latterdog, however, slips over the fixed rack 75, while the said dog 7U locksitself to the said tripping rack 58. Further downward movements of theplunger I8, strip ier 62, trippiin rack 58 and other parts will, tiroiigli the sait tripping rack, move the tripping arm til intoengagement with the upper end of the sleeve 56 which is on the trippingrod 54, and un'der still further downward movements of said parts, thesaid trippin f rod will he moved downward and through the licain 53 andlilik 52, the latch lever 50 would he raised ahovc the engaged end ofthe shipper rod 43, thereliy permitting the. s )ring 46 to move theshipper 4t2-.43 towari the right with respect to Fig. 2, to throw thehelt 38 hack onto the idle pulley 36. Also, when the said shipper 42:-43is t-lius moved toward the right, the crooked upper end of its inneriii'in 42 moves away from the previously eligaged arin of the shipper40m-4l, and permits the spring 80 to simultaneously become operative tomove the helt 3tl from the loose inlley 35 onto the fixed pulley 37, andthereiy reverse the .direction of rotation of the shaft 33 and of thenut acting gear 2l.v lt will, of conm-,wlw tinderstmid that at this timethe projection titi" of the head plate 66 of the sleeve itl is loweredso that it will not intercept the downward movement of the weightedui'iii 87.

As is evident, when the rotary nioveiiient ofthe nut actin gear '.Zt isieversed, us just aliove desci'ilied, upward or return iiiovo nient.will. he imparted to the shaft .tl and sleeve It), hut it will also heunderstood that the return'movement of the plunger t8 anil sleeve willnot hegin until the sii-called llatteiied stud .tl reaches the u iperexti'einitvcf the slot 8 of the said sleeve ltl. 'lliat movement of theshaft 2t) upward with re-- spect to the sleeve ttl which takes placeiinder expansion of the spring and liefom the stud 2t) luis reached theu i ier extremity of the slot 28, cpiises the cnnillillock 8'. to throwthe dog 78 out' of engugoiiieiit with the teeth of the tripping rack 58und thereliy release the lanciwheieupon the said tripping rack will,ofcourse, he moved upward to its uorthe distance which the lower eaiplate 64 of .machine is again thrown into action,

mal position by its spring 59. A little furf ther upward ietum movementof the plunger .and its sleeve, in respect to the stri iper andl itscarrier, causes the wedge block 4 to act upon the pawl and throw thesaine out of engagement with the teeth of the ixed ratchet bar 75. Itwill, however, be noted that the said stripper and its carrier arepositively locked a inst return movements until the 'plunger as beengiven an initial return movement siiilieient to bring the same upwardwithin the stripper and into its nor mal relative position in respectthereto. As already indicated, this normal position of the plunger withrespect to the stripper, that is, the istance or'cxtent to which it willbe drawn into the said stripper de nds upon the stripper carrier is setfrom the upper head plate 63, and such adjustment may be varied vmeansofthe ad justiiblyconnected rods 05. When the threaded shaft 20 has beenmoved about one-half tl'ie distance upward from its lowered to itsnormal position, vthe projection 06 of the sleeve flange 6o engages theweighted lever 87 anil moves the same' upward, thereby moving the beltshipper 40 4l toward the left with respect to Fig. 2, with the resultthat when the plun r, its carrier, the stripper and its carrier ave beenrestored to normal positions, the belt 39 will be moved from the pulley37 onto the loose pulley 35, thereby stopping further rotation of theshaft 33 and further upward movement ofthe shaft 20. It will, of course,be understood that the shipper 42-43 under the action of its spring 46,will be held toward the right with respect to Fig. 2, so as to maintainthe belt 38 on the loose pulley 30 niiltil tlie )y t in operatorstepping on the foot piece 47.

Attention is here directed to the im rtant fact that the pressure underwhich the butter or other ma erial will be packed may be varied byadjustments of the stop sleeve 55 on the tripping rod 54. Otherwisestated, the amount of movement in the compressingv action that will begiven to the plunger after the spring 25 luis been given its initiacoinpression, will depend on the normal position of the said stopsleeve, in res clti to the coo ratin tri in arm 6l o t e tri in rapk 58.g Alsiifit liivill be understood thilitpthg amount ol'v compressionwhich will be given tothe butter or other material may be varied to aconsiderable extent by varyin the initial tenaion of the said spring. thas already been noted tliat the tension of the said spring ma be variedby adjustments of the pm 26 in t e perforations '27 of the sleeve 19.

What I claim is: l. In a machine ofthe kind described, the combinationwith a phin ver and means for eciprocating the same, o adjustable meansor reversing the plunger actuating mechanism under predetermined forceapplied to the plunger, which reversing mechanism coinprises a trip rod,an adjustable stop sleeve on said trip rod and a tripping elementoperative on said sleeve and ai apted to be coupled for movement withsaid plunger, substantially as described.

2. In a machine of the kind described, the combination with a plungerand means. for reciprocating said plunger, oi' means for reversing .aancomprising a plunge?, a plunger carrier and means for reciprocating saidplunger carrier, means for reversi the action of said lunger actuatingmec anism under pre etermined force applied to said plun r, saidreversing means comprising a yie dingly supported tripping rack, meansfor cou ling said trip iing rack to said plunger carrier under preietermined pressure applied to said plunger, a yieldingly supportedtripping rod, and an adjustable stop sleeve on said tripping rod subjectto said tripping rack, substantially as described.

3. In a machine of the kind described, the combination with a plungercarrier inclut ing a yielding element, means for vreciprocating saitplunger carrier, means for reversing the action of said plungeractuating means, when said plunger reaches the upper limit of itsmovement, and means for reversing the movement of said plunger actuatingmechanism at the other imit oi' the plungers movement and underpredetermined pressuie applied to the plunger, said latter reversingmeans coniprisiii r a vieldingly supported tripping rack, a rac engagingdog carried by the positively moved member of said ilfuiigercarrier,meanscarried b tho yielding y supported member of said p unger carriernormally holding siiid di 'out of action on said rack, but permittingsai dog to become active on said rack when said plunger is subjected topredetermined pressure, a tripping rod, and an adjustable stop on saidtripping rod arranged to be actuated by said tri ping rack underiredoternined but variable nioveinent of t ic latter, vsubstantially asdescribed.

4. 1n a machine of the kind described, the combination with a ilunger,of a two part plniiger carrier inclut ing a gielding element, means forreciprocating saii plunger carrier, means for rcversin r said plungeractuating mechanism at the limit of its upward movement, means forreversing the plunger actuating iiieehanisin at the limit of theplunrers downwardmovement and under prei etermined pressure apglied tothe plunger, comprising a tripping rac ,means for coup ing said trippingrack tosaid plungcrcarricr under predetermined compression of theyielding element of said plunger carrier, a stripper surrounding saidplunger, a plunger carrier having a limited movement with respect toplunger actuating mechanisml0 lungerI of a two part v ltripper and itscarrier under continued return movement of said plunger, substantiallyas described. i

5. In a machine of the kind described, the combination with a unger, ofa two part lo plunger carrier includm r a sleeve, a threaded shaft andan interposei spring, a gear working as a nut on the threaded end ofsaid shaft, a reversible drive to said gear, and means for reversing thesaid drive under predetermined pressure applied to said plunger at thelimit o its downward movement, substantially as described.

6. In a machine ofthe kindi'lescrihed, the combination with a plunger,of a two part carrier therefor comprising a sleeve, a threaded shaft andan interposed spring, a gear working as a nut on said threaded shaft, areversible gear drive, means for reversing said gear drive at the upwardlimit of said plungers movement, and means for reversmg said gear driveat the limit of the downward movement of said plunger, comprising atripping rack, means for eoupliii 1 said tripping rack to the threadedsha t o said'plunger carrier when said plunger is subjected to apredetermined pressure, a tripping rod connected to said reversibledrive, and an adj ustalile stop on said trippiii r rod subject to saidtripping rack, substantie ly as described.

7. In a machine of the'kind described, the combination with a plungerand plunger carrier, of a stripper carrier inoiinteil on said plungercarrier and comprisinir a lower head plate 64, a stri per 62 surrouniing said plunger and provii ed with liookeil arms i0 terminating inhooked ends 7l thaty work through seats in said plate (i4, and a lockspring T. nteriiiedately attached to said plate |54 and the ends ofwhich are enga 'cable with said hooked ends 7l, suhstaiiliii ly asdesci'iluid.

In testimony whereof I allx my signature. in presence of two witnesses.

JOHN MAT'ISON.

